用不同晶型的纳米TiO2制备出了纳米级SO42-/TiO2固体超强酸.用BET(Brunauer,Emmett and Teller)法测定了在不同H2SO4溶液浓度、不同焙烧温度、不同浸泡时间及不同浸渍液时,比表面积的变化情况.结果表明用锐钛型纳米TiO2,以H2SO4溶液浸泡...用不同晶型的纳米TiO2制备出了纳米级SO42-/TiO2固体超强酸.用BET(Brunauer,Emmett and Teller)法测定了在不同H2SO4溶液浓度、不同焙烧温度、不同浸泡时间及不同浸渍液时,比表面积的变化情况.结果表明用锐钛型纳米TiO2,以H2SO4溶液浸泡,在350℃焙烧所制备的固体超强酸的比表面积最大,为211.0 m2/g.展开更多
A series of SO 2- 4/TiO 2 SiO 2 catalysts with different mass fractions of SiO 2 were prepared by sol gel method. The effect of adding SiO 2 on the crystal structure, specific surface area, oxygen adsorption, and acid...A series of SO 2- 4/TiO 2 SiO 2 catalysts with different mass fractions of SiO 2 were prepared by sol gel method. The effect of adding SiO 2 on the crystal structure, specific surface area, oxygen adsorption, and acidity of SO 2- 4/TiO 2 catalyst and its photocatalytic property for degradation of bromomethane was studied. The results showed that the specific surface area and amount of oxygen adsorption of catalyst were increased by addition of SiO 2, leading to the obvious increase on photocatalytic activity of SO 2- 4/TiO 2 SiO 2 catalysts and mineralization ratio of bromomethane. Comparing with SO 2- 4/TiO 2, the acidic strength and anti moisture ability of SO 2- 4/TiO 2 SiO 2 catalyst were decreased.展开更多
The syntheis of diphenyletylane with xylol and styrene as reactants and solid superacid SO42-/TiO2 doped rare-earth metal ion La3+ as a catalyst was reported.The results showed that the optimal conditions were using 1...The syntheis of diphenyletylane with xylol and styrene as reactants and solid superacid SO42-/TiO2 doped rare-earth metal ion La3+ as a catalyst was reported.The results showed that the optimal conditions were using 1% of catalyst with the molar ration of xylol to styrene being 7.5:1,at temperature of 140℃ for 3 h;The yield of diphenylethylane under such conditions was about 97.5%.展开更多
文摘用不同晶型的纳米TiO2制备出了纳米级SO42-/TiO2固体超强酸.用BET(Brunauer,Emmett and Teller)法测定了在不同H2SO4溶液浓度、不同焙烧温度、不同浸泡时间及不同浸渍液时,比表面积的变化情况.结果表明用锐钛型纳米TiO2,以H2SO4溶液浸泡,在350℃焙烧所制备的固体超强酸的比表面积最大,为211.0 m2/g.
文摘A series of SO 2- 4/TiO 2 SiO 2 catalysts with different mass fractions of SiO 2 were prepared by sol gel method. The effect of adding SiO 2 on the crystal structure, specific surface area, oxygen adsorption, and acidity of SO 2- 4/TiO 2 catalyst and its photocatalytic property for degradation of bromomethane was studied. The results showed that the specific surface area and amount of oxygen adsorption of catalyst were increased by addition of SiO 2, leading to the obvious increase on photocatalytic activity of SO 2- 4/TiO 2 SiO 2 catalysts and mineralization ratio of bromomethane. Comparing with SO 2- 4/TiO 2, the acidic strength and anti moisture ability of SO 2- 4/TiO 2 SiO 2 catalyst were decreased.
文摘The syntheis of diphenyletylane with xylol and styrene as reactants and solid superacid SO42-/TiO2 doped rare-earth metal ion La3+ as a catalyst was reported.The results showed that the optimal conditions were using 1% of catalyst with the molar ration of xylol to styrene being 7.5:1,at temperature of 140℃ for 3 h;The yield of diphenylethylane under such conditions was about 97.5%.
